Code Editor for app.py

import streamlit as st

st.title("Investment Calculator")

# Get user input
initial_amount = st.number_input("Enter initial investment amount (PKR)", min_value=0.0, value=1000.0)
years = st.number_input("Enter number of years", min_value=1, value=5)

# Calculate final amount using the formula: initial_amount × (1.20)^years
interest_rate = 0.20
final_amount = initial_amount * ((1 + interest_rate) ** years)

# Calculate total profit
total_profit = final_amount - initial_amount

# Calculate monthly earnings
monthly_earnings = total_profit / (years * 12)

# Display results
st.write("---")
st.write("### Results")
st.write(f"Initial Investment: PKR{initial_amount:,.2f}")
st.write(f"Investment Period: {years} years")
st.write(f"Final Amount: PKR{final_amount:,.2f}")
st.write(f"Total Profit: PKR{total_profit:,.2f}")
st.write(f"Monthly Earnings: PKR{monthly_earnings:,.2f}")

# Add explanation
st.write("---")
st.write("### How it works")
st.write("""
This calculator uses the compound interest formula with a 20% annual return rate:
- Final Amount = Initial Amount × (1 + 0.20)^Years
- Total Profit = Final Amount - Initial Amount
- Monthly Earnings = Total Profit ÷ (Years × 12)
""")